Share a collection of Linux command shortcuts

Auxiliary operations for command line editing:

Tab key: automatic completion

Ctrl +U: Clear to the first line

Ctrl +K: Clear to the last line

Ctrl +L: (or clear) Clear the screen

Ctrl +C: Cancel the execution of the command

Get help command:

Internal command help For example: help cd

Most external commands --help

Use the man command to read the manual

Read the manual using the info command

Directory operation command:

pwd: used to view the working directory

cd: Used to switch the working directory. For example: cd (working directory location)

ls: (List) Display directory content. For example: ls (option),, , (file or directory)

mkdir: Create a new directory

du: Statistics the space usage of directories and files (-h displays in more readable bytes K M, -s only Count the space occupied by each parameter)

File operation command:

touch: Create a new empty file

file: View file type

cp: (copy) copy file or directory cp [option] source file or directory file or directory

(-r) Recursively copy the entire directory tree

rm:(remove)Delete a file or directory

mv: (move) Move files or directories

File content operation command:

cat:Display the entire contents of the file

head: View the beginning of the file (head -n line number file name)

tail: View End of file content (tail -n file name)

vi editor working mode:

File directory permissions:

1. Types of permissions
Read read r 4
Write w 2
Executable execute x 1
No permission - 0
2. Permission to view the file
ls -lh
-rw- rw-r-- 1 soft01 soft01 30 June 16 10:39 itany.txt
drwxrwxr-x 5 soft01 soft01 4.0K June 16 09:28 movie

- rw - rw- r--
d rwx rwx r-x
The first part indicates the type of file
The second part indicates the permissions of the owner
The third part indicates the permissions of the group
The fourth part Indicates the permissions of others
3. Modify permissions
Use the chmod command, there are two ways of writing:
a.Writing method 1
chmod [ugoa] [+-=] [rwx] file
chmod o-r itany.txt
chmod g=r itany.txt
chmod o+rw itany.txt
b. Writing method 2
’s ’s setting ’s owner to be read-only-belonging to group--- chmod o-r itany.txt
Can read and write, others can only read
chmod u=r itany.txt
chmod g=rw itany.txt
chmod o=r itany.txt

chmod u=r,g=rw,o=r itany.txt

chmod 464 wbs17061.txt
chmod 777 itany.txt

Check network information:

ifconfig: Check ip address

ping: Test network Situation

netstat: View network connection status

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